Automatic shut-off cock.



C. D. BLAGKMAN.. v

AUTOMATIC SHUT-OPP COOK.

APPLICATION FILED FEB. 14, 1912.

1,050,423, Patented Jan. 14, 1913.

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COLUMBIA PLA'NouRAPH CO-IWASHINGTON. 0. c4

CHARLES I). BLACKMAN, 0F DODGE CITY, KANSAS.

AUTOMATIC SHUT-OFF COCK.

Specification of Letters Patent.

Patented Jan.14,1913.

Application filed February14, 1912. Serial No. 677,423.

T 0 all whom it may concern:

Be it known that I, CHARLES D. BLACK- MAN, a citizen of the UnitedStates, residing at Dodge City, in the county of Ford and State ofKansas, have invented certain new and useful Improvements in AutomaticShut-Off Cocks, of which the following is a specification.

This invention relates to automatic shut off cocks.

The object of the invention resides in the provision of an automaticshut off cock disposed in the connection between a water main and thepiping of a building and which has associated therewith automatic means,operable when the temperature reaches the freezing point, for closingsaid shut off cock and draining the piping within the building toprevent freezing of the latter.

IVith the above and other objects in view, the invention'consists in thedetails of construction and in the arrangement and combination of partsto be hereinafter more fully described and particularly pointed out inthe appended claim.

In describing the invention in detail, reference will be had to theaccompanying drawings wherein like characters of reference denotecorrespondingparts in the several views, and in which Figure 1 is a viewin elevation of a portion of the connections between a water main andthe piping of a building showing the invention applied, the parts of theautomatic shut off cock being shownin full lines in the position theywould occupy when the shut ofi cock is open, and in dotted lines in theposition they would occupy when the shut off cock is closed, Fig. 2, anenlarged longitudinal section through the shut off cock with the partsthereof in open position, and Fig. 3, a view similar to Fig. 2 with theparts of the shut off cock in closed position.

Referring to the drawings, 10 indicates the ground in which is buried aconnection 11 leading from a water main (not shown). The delivery end ofthe connection 11 has attached thereto a valve casing A and this casingis provided with a discharge opening 12 and a drain opening 13. Securedin the discharge opening 12 is the intake end of a building piping 14.Mounted in the casing A is a valve plug 15 constructed in the well knownmanner whereby said plug in one po sition will place the intake anddischarge openings in the casing A in communication with each other,while the movement of said plug to another position will place the drainopening 13 in communication with the discharge opening 12 and at thesame time close communication between the discharge opening 12 and theconnection 11. Mounted upon the piping 14 in any suitable manner is avertical arm 16 having a lateral extension 17 at its upper end directedtoward the casing A and terminating in a depending portion 18 whichsupports a hook 19. This hook 19 engages an eye member 20 suitablyanchored in the upper end of a closed glass vial filled with water.Depending from the lower end of this vial 21 is an eye member 22 whichis engaged by a hook 23 secured to the upper end of a weight 24 wherebysaid weight may be supported in an elevated position. The valve plug isadapted to be rotated by an operating lever 25 secured thereto in theusual and well known manner. The free end of this lever 25 carries a pan26 which is disposed directly beneath the weight 24 when the valve plug15 is positioned to aiford communication between the connection 11 andthe piping 14. In this last named position of the valve plug 15 the freeend of the lever 25 is also disposed above the .plane of the casing Aand the connection 11 so that when said weight 24 is released it willdrop upon the pan 26 and move the free end of the lever 25 downwardwhich will operate the Valve plug 15 so as to close communicationbetween the connection 11 and the piping 14 and open communicationbetween said piping 14 and the drain opening 13. Secured to theextension 17 is the upper end of a chain 27 and the lower end of thischain is secured to the pan 26 while its intermediate portion isconnected to the weight 24. The length of chainbetween its connectionwith the weight 24 and its connection with the extension 17 is such thatwhen the weight 24 is released it can move downwardly a suflicientdistance to operate the valve plug 15 to closed position before thedescent of said weight is arrested by the chain 27. Again the length ofchain between the pan 26 and its connection with the weight 24 is suchthat the elevation of the weight 24 will simultaneously operate thevalve plug 15 to open position.

Assuming the parts to be in the position shown in Fig. 1 it will beapparent that upon a freezing temperature being reached the water in thevial 21 will freeze and burst said vial thereby releasing the Weight 24which will then descend and engage the pan 926 so that continued descentof the Weight will operate the valve plug 15 to closed positicn and alsoopen communication between the piping 1% and the drain opening 13whereby the Water in the piping throughout the building Will be drainedand the possibility of freezing and bursting of the pipes Within thebuilding obviated.

ll'hat is claimed is:

The con'ihination with a Water supply pipe, a shut oil and drain cockdisposed in said pipe and an operating lever for the latter, of asupport, a Weight suspended from rose tes said support in position toengage the tree end of the operating lever during its descent whenreleased, said Weight adapted to be severed from the support upon apredetermined reduction of temperature, and a chain having its terminalsconnected respectively to the support and the free end of the operatinglever and its intermediate portion connected to said weight.

In testimony whereof ll aflix my signature, in the presence of twowitnesses.

CHARLES D. BLAClQlt lhlih l Vitnesses Giro. E. LAUGHEAD, G120. B. DUGAN.

(Rapier of this patent may be obtained for five cents each, byaddressing the Gommissioner of Patents, Washington, D. f3.

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